Authoring Apps for cross platform

Quick question… I’m creating a standalone app from a Max/MSP patch, and ultimately, I will need a version that runs on Windows as well (I’m on Mac OSX).

In order to have a Windows version, would it be as simple as sending my Max/MSP patch (which I understand to be cross platform)to a Windows version user and asking them to build a standalone from their system? Would the end result be an identical program that would run on Windows?

If you’re going to do this more often, you might consider investing in a program like parallels (I believe there is even free software which does the same) and Windows. Contrary to what has been stated before on this forum, it is possible to authorize a version of max 5 in parallels.